Random trivia time! Here are some fun and not-so-fun facts about guinea pigs. Guinea pigs or domestic guinea pigs (Cavia porcellus), also known as cavy or domestic cavy, despite their common name, are not native to Guinea, nor are they related to pigs. The origin of the name eludes us still… They were originally bred as livestock, and they still are. Guinea pigs don’t exist in the wild. The guinea pig has enjoyed widespread popularity as a household and pocket pet since they arrived in Europe in the 16th century through traders. Their docile nature, friendly responses, and low-maintenance care requirements make them great conquerors of people’s hearts.